I share on this blog my work and experience about my work: I'm a specialist of test and measurement bench using National Instruments products as hardware and software: LabVIEW, TestStand, LabWindows/CVI, Measurement Studio.

vendredi 1 novembre 2013

For this project, my client asked me to increase the capacity of their test suites for your after-sales service: going from 500 units daily to 2500 units per day(units here are modems ADSL / VDSL telephone, HPNA, WIFI , WAN, Ethernet and USB.)Using benchmarks aftermarket in this case is to analyse and give a diagnosisto replace defective components and then verify that the repair has solved the problem.

Analysis

To optimize the test suites in the best way,the analysisis essential to decide what to do I found several factors that limited the ability.:

too many manual actions: the test is unfair,well, whenever operator interventionThecan not perform actions on another bank.

bank usability testing: the operator loses time to place the unit, connect and disconnect.

false failures: if false failures, operator definitely test and the test is restarted, we lose time. False failuresThey can be caused by hardware (measurementinstabilitydue to instrumentation wiring, connectors or other components) and software (processing measurement,analysis, tolerance).

the use of hardware resources: all tests are run one after the other,whilesome can run in parallel on the same drive or multiple drives.

process: having a single bank, to execute all actions and testing is not always the best solution.The number and functions of banks depend on the product, the tests to be performed,the environmentand why we test.

optimization of the line: the placement of the test suites may penalize the flow,forcingthe operator to waste time in their movement and increase the risk ofhandling errors that may damage the product.

traceability: havingthe product history is important to optimize the repair, fluidize (nottry a product that has been tested failed previous tester without any repair), diagnose problems l testProvide maintenance actions,but alsoto analyze production.

Solution

After presenting an analysis of the identification of problems,I worked withmy client on several points:

Review of the line and testers to improve the flow,ergonomicsand movement of operators and products.

use of the material now available,replacingand adding new, rewiringand connector type for better reliability and speed.

l migration software testing from test scripts executed from the Linux command line to test sequences of TestStand on Windows by creating a simple screen(test in progress, goodor badresult,pending test) to test parallelization to reduce the time.

test report generation, datacentralizationin the network and development of data analysis software.

Who I am?

I'm a Test and Measurement freelance engineer, a LabVIEW, TestStand, LabWindows/CVI expert and National Instruments products specialist.For my job I like to travel and talk to people in different languages: English, French, Spanish, Portuguese and German.